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Over-fault advance support method
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A kind of seam mining bottom plate limestone water control method
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Pump truck for split type caterpillar drilling machine
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Multifunctional eccentric wheel is from chain type dental forceps spanner
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The quick anchor restorer of anchor cable
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Return air channel and its manufacturing method are reserved for withdrawing working face flexible shield-type
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Anchor cable secondary protection device
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Deep hole rust remover
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A kind of electricity-generating method that water potential energy is reclaimed using underground mine water supply system
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